<template>
    <div class="seller" ref="seller">
      <div class="seller-content">
        <div class="overview">
          <h1 class="title">{{seller.name}}</h1>
          <div class="desc border-1px">
            <star :size="36" :score="seller.score"></star>
            <span class="text">({{seller.ratingCount}})</span>
            <span class="text">月售{{seller.sellCount}}单</span>
          </div>
          <ul class="remark">
            <li class="block">
              <h2>起送价</h2>
              <div class="content">
                <span class="stress">{{seller.minPrice}}</span>元
              </div>
            </li>
            <li class="block">
              <h2>商家配送费</h2>
              <div class="content">
                <span class="stress">{{seller.deliveryPrice}}</span>元
              </div>
            </li>
            <li class="block">
              <h2>平均配送时间</h2>
              <div class="content">
                <span class="stress">{{seller.deliveryTime}}</span>分钟
              </div>
            </li>
          </ul>
          <div class="favorite" @click="toggleFavorite">
            <span class="icon-favorite" :class="{'active': favorite}"></span>
            <span class="text">{{favoriteText}}</span>
          </div>
        </div>
        <split></split>
        <div class="bulletin">
          <h1 class="title">公告与活动</h1>
          <div class="content-wrapper border-1px">
            <p class="content">{{seller.bulletin}}</p>
          </div>
          <ul v-if="seller.supports" class="supports">
            <li class="support-item border-1px" v-for="item in seller.supports" :key="item">
              <span class="icon" :class="classMap[item.type]"></span>
              <span class="text">{{item.description}}</span>
            </li>
          </ul>
        </div>
        <split></split>
        <div class="pics">
          <h1 class="title">商家实景</h1>
          <div class="pic-wrapper" ref="pics">
            <ul class="pic-list" ref="picList">
              <li class="pic-item" v-for="pic in seller.pics" :key="pic">
                <img :src="pic" width="120" height="90">
              </li>
            </ul>
          </div>
        </div>
        <split></split>
        <div class="info">
          <h1 class="title border-1px">商家信息</h1>
          <ul>
            <li class="info-item" v-for="info in seller.infos" :key="info">{{info}}</li>
          </ul>
        </div>
      </div>
    </div>
</template>

<script>
import star from '../star/star.vue';
import split from '../split/split.vue';
import BScroll from 'better-scroll';
import { saveToLocal, loadFromLocal } from '../../common/js/store.js';

export default {
  data() {
    return {
      // favorite: false
      favorite: (() => {
        return loadFromLocal(this.seller.id, 'favorite', false);
      })() // 用一个立即执行函数从本地缓存里面导入数据
    };
  },
  props: {
    seller: { // 由于router-view组件传过来一个seller属性，所以我们也可以在这个组件里面来接收
      type: Object
    }
  },
  components: {
    star: star,
    split: split
  },
  created() {
    this.classMap = ['decrease', 'discount', 'special', 'invoice', 'guarantee'];
  },
  mounted() { // 使用 mounted 并不能保证钩子函数中的 this.$el或者this.$refs.xxx 在 document 中。为此还应该引入 Vue.nextTick/vm.$nextTick
    console.log('mounted!');
    this.$nextTick(() => {
      this.scroll = new BScroll(this.$refs.seller, {
        click: true
      });
    });
    // 调用图片滚动的方法
    this._initPicsScroll();
  },
  computed: {
    favoriteText() {
      return this.favorite ? '已收藏' : '点击收藏';
    }
  },
  watch: {
    seller() { // 我们使用watch属性监测seller属性值的变化，一旦有了变化，立即调用滚动图片的方法
      this._initPicsScroll(); // 调用图片滚动的方法
    }
  },
  methods: {
    _initPicsScroll() { // 初始化图片区域横向滚动方法
      // 计算所有的li的宽度和，并将其设置给ul
      if (this.seller.pics) {
        let picWidth = 120;
        let margin = 6;
        let width = (picWidth + margin) * this.seller.pics.length - margin; // 在pics被加载好了之后就给ul添加宽度
        // console.log(width);
        this.$refs.picList.style.width = width + 'px';
        this.$nextTick(() => {
          this.picScroll = new BScroll(this.$refs.pics, {
            scrollX: true,
            eventPassthrough: 'vertical' // 保留原生的滑动效果，比如页面的上下滑动
          });
        });
      }
    },
    toggleFavorite(e) {
      if (!e._constructed) {
        return;
      }
      this.favorite = !this.favorite;
      // 将这个值缓存在localStorate里面去
      saveToLocal(this.seller.id, 'favorite', this.favorite);
    }
  }
};
</script>

<style lang="stylus" scoped>
@import '../../common/stylus/mixin.styl';

.seller
  position absolute
  // top 和 bottom 值来确定div的高度
  top 174px
  bottom 0
  left 0
  width 100%
  overflow hidden
  .overview
    position relative
    padding 18px
    .title
      margin-bottom 8px
      line-height 14px
      font-size 14px
      color rgb(7,17,27)
    .desc
      padding-bottom 18px
      font-size 0 // 因为里面的内容要横向排列，去除缝隙
      border-1px(rgba(7,17,27,0.1))
      .star
        display inline-block
        margin-right 8px
        vertical-align top
      .text
        display inline-block
        margin-right 12px
        vertical-align top
        font-size 10px
        color rgb(77,85,93)
        line-height 18px
    .remark
      display flex
      padding-top 18px
      .block
        flex 1
        text-align center
        border-right 1px solid rgba(7,17,27,0.1)
        &:last-child
          border-right none
        h2
          margin-bottom 4px
          line-height 10px
          font-size 10px
          color rgb(147,153,159)
        .content
          line-height 24px
          font-size 10px
          color rgb(7,17,27)
          .stress
            font-size 24px
    .favorite
      position absolute
      width 50px
      top 18px
      right 11px
      font-size 0
      text-align center
      .icon-favorite
        display block
        margin-bottom 4px
        line-height 24px
        font-size 24px
        color #d4d6d9
        &.active
          color rgb(240,20,20)
      .text
        font-size 10px
        line-height 10px
        color rgb(77,86,93)
  .bulletin
    padding 18px 18px 0 18px // top right bottom left
    .title
      margin-bottom 8px
      line-height 14px
      font-size 14px
      color rgb(7,17,27)
    .content-wrapper
      padding 0 12px 16px 12px
      border-1px(rgba(7,17,27,0.1))
      .content
        line-height 24px
        font-size 12px
        color rgb(240,20,20)
        text-indent 2em
    .supports
      .support-item
        padding 16px 12px
        border-1px(rgba(7,17,27,0.1))
        font-size 0
        &:last-child
          border-none()
      .icon
        display inline-block
        vertical-align top
        width 16px
        height 16px
        margin-right 6px
        background-size 16px 16px
        background-repeat no-repeat
        &.decrease
          bg-image('decrease_4')
        &.discount
          bg-image('discount_4')
        &.guarantee
          bg-image('guarantee_4')
        &.invoice
          bg-image('invoice_4')
        &.special
          bg-image('special_4')
      .text
        line-height 16px
        font-size 12px
        color rgb(7,17,27)
  .pics
    padding 18px
    .title
      margin-bottom 12px
      line-height 14px
      font-size 14px
      color rgb(7,17,27)
    .pic-wrapper // 横向滚动，需要一个wrapper来包裹列表
      width 100%
      overflow hidden
      white-space nowrap
      .pic-list
        font-size 0
        .pic-item
          display inline-block
          margin-right 6px
          width 120px
          height 90px
          &:last-child
            margin 0
  .info
    padding 18px 18px 0 18px
    color rgb(7,17,27)
    .title
      padding-bottom 12px
      line-height 14px
      border-1px(rgba(7,17,27,0.1))
      font-size 14px
    .info-item
      padding 16px 12px
      line-height 16px
      border-1px(rgba(7,17,27,0.1))
      font-size 12px
      &:last-child
        border-none()
</style>
